Patents by Inventor David R. Close

David R. Close has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: D297290
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: August 23, 1988
    Inventor: David R. Close